A green aventurine thumbstone is a type of crystal that is shaped like a small oval with a flat surface on one side and a rounded, thumb-shaped depression on the other.
 
Green aventurine is believed to be a stone of abundance and prosperity, helping to attract wealth and good fortune into one's life.
 
Like many crystals, green aventurine have healing properties. It is said to promote emotional balance, calmness, and positivity, and may be used in meditation or other spiritual practices to promote well-being.
 
The small size and shape of a green aventurine thumbstone make it easy to carry around in a pocket or purse, so it can be used for meditation or healing on-the-go.